[okular] [Bug 484966] New: No anti-aliasing on rotated image

[Tobias Bora]

https://bugs.kde.org/show_bug.cgi?id=484966

            Bug ID: 484966
           Summary: No anti-aliasing on rotated image
    Classification: Applications
           Product: okular
           Version: 23.08.5
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: tobias.bora at gmail.com
  Target Milestone: ---

Created attachment 168086
  --> https://bugs.kde.org/attachment.cgi?id=168086&action=edit
Pdf that showcases the bug

SUMMARY

If I render a pdf file with a rotated image (produced via a simple
\includegraphics[width=.6\paperwidth,angle=-10]{images/avantage_dwave.png}),
the image is not aliased correctly, despite anti-aliasing being enabled in
configuration > performances. The same pdf prints just fine in firefox.

STEPS TO REPRODUCE
1. Open the attached pdf

OBSERVED RESULT

Observe ugly staircase-like pattern in lines

EXPECTED RESULT

This should be aliased like in Firefox

SOFTWARE/OS VERSIONS

Operating System: NixOS 24.05
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.12
Kernel Version: 6.1.80 (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-8365U CPU @ 1.60GHz
Memory: 15.5 Gio of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

ADDITIONAL INFORMATION

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